The use of the apron may be controlled by the apron management service (apron control or apron advisory). This would typically provide a coordination service between the users.
The apron is designated by the ICAO as not being part of the maneuvering area. All vehicles, aircraft and people using the apron are referred to as apron traffic.
The words "apron" and "ramp" are used interchangeably in most circumstances. Generally, the pre-flight activities are done in ramps; and areas for parking & maintenance are called aprons. Passenger gates are the main feature of a terminal ramp.